i want update firmware on my Huawei E5331?

[089999945]

Here Info
[cod]Model: E5331
Application port: COM65
Diagnostic port: --
IMEI: 863619011151142
Firmware Version: 21.344.11.00.813
Build Date: May 28 2012 10:11:28
DL Ver:2.0
DL Info:
swver:21.344.11.00.813
isover:UTPSTOOL-ConnLaucher_WIN1.09.02.00_MAC1.09.05.00
webuiver:
product name:E5331s-2
dload type:0
Authority Id:8636190111511420,0
Authority Ver:1000[/code]

i see in support area have alot firmware but i don't know which one is correct with my E5331.
pls help me all user and supporter.

[Valdemaras]

We won't be able to advise on flashing, can only see that your current device's firmware 21.344.11.00.813 was never attempted to flash before.